/*
//内置构造函数
var emp = new Object();
//需要单独添加属性
emp.eid = 1;
emp.emae = "涛哥";
emp.sex = "男";
//console.log(emp)
for (var ke in emp){
//k代表每次的属性名
console.log(k+":",emp[ke])
}
*/
var k = new Object();
	k.a=59;
	k.b=68;
	k.c=86;
	k.d=56;
	k.e=78;
	var x=0,y=0;
for(var f in k){
	x++
	y += k[f]
		//console.log(o)
}
console.log(y/x)